4x²-45=31x -3x²+22x-24=0 (x+18)(x+1)=-12 (3x+2)(x+3)=x+14
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4x²-31x-45
4x²-[2x-(x²-2x+3)-2(x²-3x)] 计算
4x²-45=31x -3x²+22x-24=0 (x+18)(x+1)=-12 (3x+2)(x+3)=x+14
(x²-4分之x²+x+1)²÷(x三次方-3x²+2x÷x三次方)²×(x÷x+2)² ,
因式分解(有理数范围内)1.x⁴-12.x²+4x-xy-2y+43.4x²-12x+54.21x²-31x-225.4x²+4xy+y²-4x-2y-36.9x^5-35x³-4x7.3x²-6x8.49x²-259.6x²-13x+510.x²+2-3x11.12x²-23x-2412.(x+6)(x-6)-(x-6)13.
(x²+4x+8)²+3x(x²+4x+8)+2x²因式分解
分解因式:(x²+4x+8)²+3x(x²+4x+8)+2x²
(x²+4x+8)²+3x(x²+4x+8)+2x² 分解因式
xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1
若18x²-45x=0,求代数式(15x²-18x+9)-(-3x²+19x-31)-8x的值.²=2次方若18x²-45x=0,求代数式(15x²-18x+9)-(-3x²+19x-31)-8x的值.²=2次方
3x/(x²-2x),(2x+1)/(4-x²),3/(2x²+4x)通分~
1.(8xy-x²+y²)-(x²-y²+8xy)2.(2x²-1/2+3x)-4(x-x²+1/2)3.3x²-[7x-(4x-3)-2x²]
-3x²(1/3xy-y²)+4x(x²y-xy²)+x³y,其中x=1,y=
化简分式:(x-3)(x²-4)/(x²+3x+2)(x²-4x+3)
(5/x²-3x-4)+(4/x²-5x-6)-(8/x²-10x+24)=?
因式分解:(x²+4x+8)²+3x(x²+4x+8)+2x² x²(x-1)²+32(x-x²)+60
混合运算6x+2x²-3x+x²+1其中x=-5
计算:5x²-[3x-(4x-3x)-2x²]